[O3] 口頭3 《感情・動機》

[O3-05] A new experimental paradigm assessing dynamic change in motivational intensity

*Kenshiro Ichimura¹, Ikue Hasebe¹, Haruka Ichimura², Sonoko Nishizawa², Manami Miyaichi², Takayuki Goto³, Takashi Kusumi¹ (1. Graduate School of Education, Kyoto University, 2. Faculty of Development, Kyoto University, 3. Center for the Promotion of Excellence in Higher Education, Kyoto University)

Keywords:motivational intensity, experimental paradigm , manipulation of rewards

The aspects of motivation include not only direction such as expectancy and values but also intensity which is energetic and dynamic aspect. Although intensity is generally estimated from behavioral indicators, conventional methods do not sufficiently assess the dynamic change in intensity. We devised an experimental paradigm to measure this change more directly, and examined its effectiveness. We compared participants’ handgrip for 3 seconds before and after the experimental manipulation of giving rewards with the overlap of 95% confidence intervals, and estimated the dynamic change in motivational intensity. We presented 25 participants (N = 5) each with verbal or monetary rewards. Results showed that verbal reward continuously improved overall grip force for 3 seconds, and monetary reward temporarily improved grip force after confirmation of the reward. Based on the results, we discuss the contribution of this experiment paradigm to motivation research.